Elevator.



E. S. MATTHEWS.

ELEVATOR. APPLICATION FILED MAY 26, 1911.

Patented Sept. 8, 1914,

2 SHEETS-SHEET 1.

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E. s. MATTHEWS.

ELEVATOR; APPLICATION IiLED MA'Y'ZG, 1911.

1,109,853. Patented Sept. 8,1914.

2 SHEETS-611E111 2.

F I m QWiiucooe-o THE NORRIS PETERS CO., PHOTO-LITHO. WASHINGTON. D c.

UNITED sT TEsr T NT OFFICE.

. EDWIN s. MATTHEWS, or new form, n. Assreivon To oTIsELEVATo t COMPANY,

or JERSEY cITY, NEW JERSEY, A ooRroRATIon or NEW JERSEY.

ELEVATOR.

To all whom it may concern: Be it known that LEDWIN s Mnrrnnws, a citizen of the United States, residing at useful Improvement inElevators, of which the following is a specification.

My invention relates to elevators and their operation, particularly to means for controlling them as they are started and stopped by anop'eratoriinthecar:

matically insure'a smooth and determinate 4 stop, and, if desired, a start in a reversed direction without shock or jar to thewiring "mechanism, the elevator car or its passengers, strain or disarrangement of the controlling mechanism or motive apparatus, 1n-

dependent of the type of elevator machine employed or the kind of motive power utilized thereby.

By the use of this invention'the operator in making a stop, however careless he may be, is automatically compelled to permlt the car to come to rest or nearly to rest by the means provided in the apparatus for retarding and stopping the car, before he can apply the force for reversing its motion; as

will be hereinafter shown in the description of this illustration of my inventionand its mode of operation.

A further ob ect of thisinvention is roaccomplish this result positively and directly by utilizing the state of motion or rest of the car itself as a' means of automatically securing proper control of the apparatus instead of relying upon the functions of subordinate portions of such apparatus in a secondary manner ashas beenheretofore done in the art; as where portions of valves; electric controllers, and other secondary mechanisms have been more or less successfully used to accomplish this purpose, in "whichcases these secondary mechanisms are necessarily merely indirectly related in "their operationfto the state of motion or rest of the car. a I

Other objects of the invention will be now fully set forth hereinafter. x i I An embodiment of this invention is herein shown as applied to a hydraulicplunger elevator (although it is not limited to such an application) the construction and mode of operation of which as illustratedin the accompanying drawings will be hereinafter 7 Specif cation of Letters ratent'.

Patented Sept. 8, 1914.

Application filed May 26, 1911. Serial No. 529,652.

' fully setv forth in connection with this inavention the substance of which is finally pointed out in the appended claims.

New Yorlnin the county of New York and State of New York, have invented a new and I In the accompanying drawings, Figure 1 shows my invention 1n elevation applied to "a hydraulic plunger elevator and located under the elevator car; Fig. 2 is a detail plan view of certain parts under the carin Fig. 1; Fig. 3 is an 'illustrationof my invention with essential parts thereof located. g apart from the cart An object of this invention is to: autoordinary type of hydraulic plunger elevator F is "shown in wh ich the car'C, counterweight WV, plunger P, car: controlling lever K, pilot valveX and main valveV are well known *1 parts with a well known and obvious method of operation.

I Referringmorespecifically to Fig. 1, an

A supply pipe 12, and discharge pipe -11 connect the apparatus'with a source of 1 water under pressure for supply and any 3 suitable receptacle for exhaust of the fluid.

The apparatus is shown in a stopped p0- sition witlrthe car at rest, with closed main and pilot valves. A lever 13 has the valve stems P1 and 15 of themain and pilot valves 1 respectively, pivotally connected to it, while the'link 16 is pivoted to the end thereof. The control rope 17 is secured to, the segment 18 and passes around the pulleys 19 of i the car controlling lever K in such a manner that'the movement of this lever will produce a corresponding movement of the segmentl'S. One end of the rod 20 is rigidly secured: to the segment 18 and its other end is jointed tothe link 16, A movement of the l car controlling lever K by the operator thus causes a motion-ofthe pilot valve through .j its stem: 1'5: 1 either upward or downward from -its central position according to the direction: (either towardthe right or' the left) of the movement imparted to the upward branch of the T Shaped car controllinglever K by*th'e operator; this in turn causes the 1 main valveV tobe moved by the water pressure (either upward or downward as the {case-may be) either admitting pressure under the plunger and causing ascent of the car or allowing the water to be discharged from beneath the plunger P and causing its descent; while the pilot valve is returned to its-center 'or closed position by the motion ofthemain valve itself acting by its stem 14:, at one end of the lever13 upon the pilot valve through its stem 15" at an intermediate point of the lever 13 while the other end of the lever 13 is held stationary in its up or down position by the link 16 as it has been moved by the operator in the car. The pilot valve is thus set in position so that a movement of the car controlling lever back to the center moving the pilot valve, will causethe main valve to close and bring the car'to rest irrespective of whetherthe motion of the car has been that of ascent or descent,

and when the car controlling lever is in cen-:

ter position and the main valve is closed as shown in the drawings, the pilot valve is again centered and closed by the closing movement ofv the mam valve and also ap. pears as. shown in the, drawings :with the entire apparatus at rest.

In the case of an elevator unprovided wlth my invention, a careless operator, particularly if he thinks he is liable to overrun a landing, frequently throws his controlling member in the car beyond the stopping'point parts has been properly checked or arrested causing violent shock, water hammer and breakage of parts, while with electric elevators blowing of fuses and burning out of armatures may in some cases arise from such careless manipulation; while harmful results also follow in case of steam direct or belt or brake'r'etarded elevators as is known to those skilled in the art. The manner in which such undesirable manipulation of an elevator controlling mechanism is automatically prevented by my invention will be obvious from a further inspection of the drawings and the following explanation of its method of operation.

A governor rope 21 extends from the top to the bottom of the hatchway,passing about the governor pulley 22 and the idler pulley 28. Governor pulley 22 is mounted upon the shaft 24, as is also the flyball device 25 (Fig. 2). A lever 26 pivoted on the car C, has one end in connection with the sliding end piece 27 of the device 25, and as the motion of the car causes the balls thereof to fly outwardly the lever 26 is rocked accordingly. At the other end of the lever 26 is a projection 28 designed to engage in the slot 29 of the segment 30 which is secured to the hand lever K. This slot is so located that the projection engages in it only when the hand lever is in its central position. It is evident that if the hand lever K is moved over to one side and the car has attained a predetermined speed, the lever can not be the elevatorcarhas slowed down to a prescribed speed. The governor device may be so adjusted that the projection will not "be drawn out of the slot until the elevator car comes to a full stop, but the usual practice is to have it so adjusted that the projection 28 is withdrawn from the slot 29 shortly before the car comes to a full stop.

In the modification shown by Fig. 3, the governor device is shown at the bottomof the hoistway; the type of elevator and controlling means is similar to that shown by Fig. l. The control rope 17 in this case, is secured to the sheave 31, so that the movement of the lever K in the car effects a corresponding rotative movement of the sheave aboutthe pivot 32. Rigidly attached to the sheave isthe rod 20 which effects the actuation of the pilot valve X and the) main valve V in a manner similar to that;

previously set forth., The sheave wheel 31 is formed with an enlarged portion in which there is a slot 83. .This slotis adapted to receive the projection. 34 of the lever 35. The

governor rope 21 passes around the en-.

larged grooved rim of the bevel gear 10 which meshes with .a corresponding bevel gear 41 on the governor shaft 42. When the motion of the car causes the fly balls of the governor device 36 to fly outwardthey raise the lever 38, rod 37, and the lever 35, causing the projection 34 to enter the slot 33 which locks the sheave. 31 in the central position whenever the operator in the elevator car attempts to reverse the lever K from one running posit-ion past the center to a reversed running position while the car is in too rapid motion.

It is believed. that my invention is clearly set forth in the foregoing description, although it is evident that those skilled in the art to which this invention appertains may make various changes without departing from they spirit and scope thereof.

By this device an elevator is automatically protected from all injurious efiects caused by improper co-relation of its stopping starting and reversing functions caused by careless manipulation of its controlling apparatus.

What I claim and desire to secure by Let- .ters Patent of the United States is ernor operable to prevent the reversal of the controlling means when the car is traveling at more than a predetermined speed.

3. In a hydraulic elevator, the combination of a car, a controlling device for the car, means to prevent the reversal of the controlling device when the car is moving above a predetermined speed, and a mechanical safety governor operated by the in the direction corresponding with the position of the lever on either side of its central position. i

5. In an elevator, the combination of a car, motive means therefor, a lever in the car to govern the motive means, and a centrifugal speed governor operable to prevent the reversal of the lever when the elevator car is moving too fast.

6. In an elevator, the combination of a car, motive means for the car, a lever in the car to control the motive means, a speed governor operated by the car, and a locking device operated by said governor to prevent the reversal of the controlling lever when the elevator car is moving above a predetermined speed.

7. In an elevator, the combination of a car, motive means therefor, a controlling lever in the elevator car, a slotted segment attached to the said lever, alever having a projection adapted to engage in the slot,

and a speed governorv connectedto said lever and holding said projection in contact with the segment to prevent the controlling lever from being moved past its central position when it has been moved to a running position until the elevator car reaches a prede- I termined slow down speed.

8. In an elevator, the combination of a car, motive means therefor, a controlling lever in the elevator car, a slotted segment attached to the said lever, a lever having a projection adapted to engage in the slot, and a centrifugal speed governor dependent for operation, upon the movement of the elevator car and operative to prevent the movement of the controlling lever from a running position thereof past the central position until the elevator car reaches a certain slow down speed.

, 9. In ahydraulic elevator, the combination of a car, of main and pilot valves,

means 'in the elevator car to control the valves, and a governor device operated by the car as it moves to prevent the reversal of the controlling means inthe valves until the car, has reached a predetermined and safe slow down speed. c

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses. I

EDWIN s. MATTHEWS.

Copies of this patent may be obtained for five was each, by addressin g the Commissioner of Batents,

' Washington, D. 0. 

